WBUT 2012 STEAM GENERATOR & ITS AUXILIARIES Question Paper Code [CS/B.Tech(PWE)/SEM-6/PWE-601/2012]

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CS/B.Tech(PWE)/SEM-6/PWE-601/2012

2012

STEAM GENERATOR & ITS AUXILIARIES

Time Allotted : 3 Hours                                 Full Marks : 70

The figures in the margin indicate full marks.

Candidates are required to give their answers in their own words

as far as practicable.

GROUP – A

( Multiple Choice Type Questions )

1. Choose the correct alternatives for the following : 10x1 = 10

i) The purpose of raw coal feeder in a pulveriser is

a) to control the flow of coal to the mill

b) to control the flow of air to the mill

c) to control the speed of mill

d) to cut off coal supply to boiler furnace.

ii) Capacity of I.D. Fan should be

a) more than F.D. Fan

b) less than F.D. Fan

c) equal to F.D. Fan

d) I.D. fan capacity is not linked to FD fan capacity.

iii) Main purpose of drum internals is the boiler drum is

a) to provide easy path for steam and water

b) to separate water particles from steam

c) to increase the strength of the drum

d) to separate suspended solids attached to steam

particles.

iv) In the boiler tubes only desirable type of boiling is

a) film boiling

b) nucleate boiling

c) no boiling is desirable in boiler tubes

d) departure from nucleate boiling.

v) Principle function of installing electrostatic precipitators

is

a) to reduce load on ID fan

b) to minimize atmospheric pollution

c) both (a) and (b)

d) for easy operation of ash handling plant.

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